I have no medical education beyond Google.
Isolate the specific medical jargon and Google each phrase. Your age, pre-established diagnoses, and the physical complaint you presented with is important to the dr interpreting your MRI results.
From one study: Most retention cysts of the maxillary sinus spontaneously regressed or showed no significant change in size over the long term. These findings suggest that, in the absence of associated complications, "wait and see" may be the appropriate management strategy for these retention cysts.
From one study: study of 246 mri's showing all the different diagnoses those patients have [keep in mind they already had symptoms if their dr ordered an mri.]: widened perivascular spaces - 11, foci most probably associated with brain aging -21, with migraine -15, ischaemic changes -52, vasculitis -12, hypoxic-ischaemic changes -8, haemorrhagic foci -11, inflammatory changes -20, multiple sclerosis -50, central pontine and extrapontine myelinolysis -7, metastases -7, changes caused by radio-and chemotherapy - 8, lesions associated with neurometabolic diseases - 10, CNS degenerative diseases - 13, and eclampsia in 1 case. [Not mentioned is psychiatric diseases which may be considered a symptom, not a diagnosis.]
I volunteered for a brain MRI to test the latest newest machine in development. I wanted to know in advance what to look for on my images which I was given about 10 seconds (grrr) to look at. I would gladly have given up the $5 coffee coupon lol... for the images on a CD to study at home.
My general idea from Google in advance was to look for bad things like patches of whispy white fog overlayment, or round golf balls (not including eyes lol.) Whew, no fog or golf balls.
Search Google Images to look at brain mri images. What admiration I have for whoever created that brilliant technology.